## CVE-2021-33587 - Medium Severity Vulnerability

Vulnerable Libraries - css-what-4.0.0.tgz, css-what-3.4.2.tgz

css-what-4.0.0.tgz

a CSS selector parser

Library home page: https://registry.npmjs.org/css-what/-/css-what-4.0.0.tgz

Path to dependency file: react-accordion-ts/package.json

Path to vulnerable library: react-accordion-ts/node_modules/css-what

Dependency Hierarchy: - cssnano-5.0.5.tgz (Root Library) - cssnano-preset-default-5.1.2.tgz - postcss-svgo-5.0.2.tgz - svgo-2.3.0.tgz - css-select-3.1.2.tgz - :x: **css-what-4.0.0.tgz** (Vulnerable Library)

css-what-3.4.2.tgz

a CSS selector parser

Library home page: https://registry.npmjs.org/css-what/-/css-what-3.4.2.tgz

Path to dependency file: react-accordion-ts/demo/package.json

Path to vulnerable library: react-accordion-ts/demo/node_modules/css-what

Dependency Hierarchy: - parcel-2.0.0-nightly.688.tgz (Root Library) - config-default-2.0.0-nightly.690.tgz - optimizer-htmlnano-2.0.0-nightly.690.tgz - htmlnano-0.2.9.tgz - svgo-1.3.2.tgz - css-select-2.1.0.tgz - :x: **css-what-3.4.2.tgz** (Vulnerable Library)

Found in HEAD commit: 3884b77be89849b3860c41dec716ba5e9229c826

Vulnerability Details

The css-what package before 5.0.1 for Node.js does not ensure that attribute parsing has Linear Time Complexity relative to the size of the input.

Publish Date: 2021-05-28

URL: CVE-2021-33587

CVSS 3 Score Details (5.3)

Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: Low - Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33587

Release Date: 2021-05-28

Fix Resolution: css-what - 5.0.1

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CVE-2021-33587 (Medium) detected in css-what-4.0.0.tgz, css-what-3.4.2.tgz #439

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